Trolley breaker



N o Model.)

H'. P. BALL & 0. A.- LIEBQ TROLLEY BREAKER.

No. 542,-228. PatentedJuly 9,1895.

FTEJ.

111mm PRICE BALLIAND CHARLESADAM LLEB, F NEWXORK, SSIG ORS roTuE GENERALELECTRIC COMPANY, on son NEorAnY, NEW-YORK.

TROQLLIYEY-B EAKE'R.

snnoirrcarxon forming s of Letters Patent No. 542228, dated July e,1895,. 1'

' Annlication filed August 8,1894. Serial No. 519.719. (Nomodeld TofdZZWILD 17bit may concern:

Be it known that we, HENRY PRICE BALL Qand CHARLES ADAM I'jJIEB,citizens of the United States, residing at New York, county of New York,and State of New York, ha ve.

invented certain new and useful Improvements in 'lrolley-Breakers, ofwhich the following is a specification.

Our invention relates to line-section insu lators fortroliey-lines,cornmonly called trolley-break ers; and it has for itsobject to provide an insulator of the kind described, which shall be atthe same time strong and light and capable ot'easy repair withoutbeing-re tl1e m, so that no current can leak across the insulator,while-the two wooden bars are so connected in plac'exthat they maybereadily removed and newones substituted in their place without takingthe insulatorfrom its place in line, as already pointedout.

Y The accompanying drawings show an embodirnent of our invention, andtherei n.

Figure 1 is a side elevation, and Fig. 2 an end. view, of ourimprovedtrolley-breaker.

' Fig. 3 isa detail showing' the construction of thereon.

the lower'arui; and Fig. 4 is a sectiomupon theliue X X of Fig. 3,showing the"manner,ot supplying the metallic envelope Fig. 5 is a.vertical cross-section through one of the end pieces of thetrolley-breaker.

A is the lower bar of the insulator, made of wood and having metallicenvelopes a, a. (Better illustrated in Figs. 3 and 4.) This metallicenvelope is formed with V re-entering folds a adapted to secure itfirmly '45 in place, and through the folds and the wood are passedrivets or screws d d. A slotted tongue at projects from the envelope,the

whole being stamped out of-a single piece of sheet metal and turned overto the form desired.

.B B show the end pieces or heads of the trolley-breaker formed of acomposition, such as brass orbronze. The heads B Bare each provided witha socket a open at the bottom and inner end of heads B, in which islocated a slotted tongue a, of the arm A, the tongue a beingadaptedto'be moved into and out of position in the Socket a vertically throughthe bottom of head B. Screws b'passthrough these heads and engage 'in'the slotted tongue a of the bar A to secure'it in vertical position'.Passing through these heads is a ecu-- tral bar 0 of iron, carefullyinsulated" from theheads by a sleeve H of any appropriate insulatingmaterial; For this purpose, however, we prefer the insulating-materialknown in the art as Liebite, as it is readily molded in place under heatand pressure and then be comes adherent to the bar. Enlarged heads H Hof this material are also formed to in o close the head ot' the bar 0.()ue'ot these heads maybe formed by upsetting the bar, or: i

may consist of a large sleeve-nut having'an interior thread, theparticular construction being immaterial. Q

, A nut 0' projects beyond the other end ofthe trolley-breaker and formsa means of regu' lating the compression of the bar G, securing the twoheads B B together. In the heads are formed groovesb, which are intendedto re- So ceive the trolley-wire which passes up through these grooves,and is then held in place by the plates 2. The holtsEE' being thentightened the late 8 is forced against a part of the-surfac of the headB, with which it registers, and-the trolley-wire is firmly clamped inplace. A hole of proper size,-indicated at F, is also provided, in whicha fe'edenwire may be inserted and secured in place by a set-screw G,provided with a lock-nut g,'as '0 best-shown in section at the left inFig. 1.

The upper or compression member of the trolley-breaker (which is,,in.'reality, a truss in itsconstruction) is indicated at D, and-is alsoformed of wood, having ends' finished to register with the sockets inthe heads 15.

(Shown in dotted lines at d'id'.) A span-wire. hook D is also shownhaving a centralopen iug'embracing the bar; This is of ordinary 1construction, however, and forms 'no part of no our inventionin thisparticular case.

The use and operation of our improved 'trol- Icy-breaker will be readilyunderstood from the preceding description. It is erected by attaching itto the span'wire by the hook D. The trolley-wires are then insertedthrough the channels b band brought around the bolts E E and between theplate e and the sur- 5 face of the metallic end piece B, after which thebolts are turned until the wire is firmly secured inplace. If desired,it may be sol- --dere'd into metallic connection, although this 'is notessential, as good contact, is made by thepressnre of the bolts.Feeder-wires arethen lnsertel "in the holes F and secured in place bythe set-screws G, after which the span-wire .is adjusted to bring up thetrolley breaker into alignment. The onlypnrtof the :5 device subject towear is the barA, which, by reason of flashing as the trolley passesover it, in time becomes too weak or gets out of shape, so as to renderthe trolley liable to jump; but it maybe readily renewed withoutdisturbing the other parts of the trolley breaker by removing the screwsb to permit the tongues a to be drawn down out of the slots 0. in themetallic end pieces B, and a new one may be inserted and the screws bre- 15 "placed to hold the bar A in place. In use tion', (so that no arewill follow the trolley from one section to the other of the wire,) ande ease of adj ustment and repair. Byour improved construction we get aweight less than two-thirds that of many trolley-breakers now in use, atthe-same time increasing the dis-" tunes from one section to the otherof the 1,5 trolley-wire to double that ol. the ordinary patterns, andalso getting great strength by reason of the tensile strength of the bar01 What we claim as new, and desire to secure by Letters Patent of theUnited States, is

1. A trolley breaker comprising metallic end-pieces, compression andextension mam bers having their ends located in the metallic end-pieces,and a middle' brace or bar being longitudinallyadj ustable and adaptedto compress the parts in place. r

2. As a new article of manufacture, a trol-, ley breaker or line sectioninsulator for electric conductors, consisting of metallic end piecessecured together by acentral bar 0 of metal, insulated from such piecesarid having an upper and lower bar of wood adapted to act as compressionand extension members respectively, and means, substantially asdescribed, for permitting the end piecesto move outwardly on the ends ofthe extension member and yet retain the latter in place.

3. A trolley breaker consisting 0i metallic end pieces and threelongitudinal bars arranged in a vertical plane and spaced from oneanother, the top her being a compress on member and the lowest bar anextension member, said bars having their ends connected to and insulatedfrom the metallic cud pieces,ancl the lowest bar being removable fromthe metallic end-pieces without disturb- 1 'ing th'e other parts of thetrolley breaker.

, 4." A trolley breaker consisting of metallic end pieces, threelongitudinal bars, one of the outer ones of which is a compressionmember, and the other an extension member, means for permitting the endpieces to move outwardly on the ends of the extension member and yetretain the latter in place, the said .three longitudinal bars beingspaced from oneanother and having theirends connected to and insulatedfrom the metallic end pieces, and means for adjusting the middle barlongitudinally.

5. As a new article of manufacture, a trolley breaker comprising anupper bar D of wood, a span' wire attaching member D there0n,a centralbar 0 of metal, a lower bar A of wood having a metallic envelope (1 uponits ends, and metallic end pieces 13,13; the central bar being insulatedfrom the metallic and pieces and provided with adjustments for itslength, whereby the insulator may be taken down or assembled withoutremoving it from its place.

6. in a ll'Olley breaker or line section 1m sulator, a lower bar as A,of an insulating material, provided with metallic envelopes a havingslotted tongues a, the metallic envelopes being formed in a singlepiece.

7. Ina trolley section insulator, the combination with the metallic endpieces B having-a socket in their inner face, of the bar A of insulatingmaterial'having the metallic envelopes a at its ends, with theopen-ended slotted projection a engaging and secured in the-socketsinthe pieces B.

8. A trolley section insulator composed of the following parts; endmetallic pieces to re-.

ceive the trolley and feed wires, having sockets on their lower innerface, a bare)? insulatihg material sheathed with metal at its ends anddetachably secured in the sockets of the end pieces, an intermediatemetallic rod detachably secured'to the end pieces and insulatedtherefrom, and a removable top-barof insulating material carrying ametallic span wire bracket, the end pieces of the insulator beingprovided with plates and bolts for clamping the feed wires thereto.

In witness whereof we have hereunto set our hands the 27th day of Julyand 2ddayof August, 1894, respectively.

HENRY PRfoE BALL. CHARLES ADAM LIED. Witnesses:

J. M. ZAPATIA, J 1:, W. H. Mom.

